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| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2009-08-06 04:41:47 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-08-06 13:14:23 -0700 |
| commit | c60a5cf7af0a94cf8b09ca22796affa5f5f0669a (patch) | |
| tree | 1330bf94e68effdcadd833d0d10ef137fbe358e8 /drivers/net/tc35815.c | |
| parent | db30f5ef6e4471fd55671382b8870fdd61e35814 (diff) | |
| download | kernel_samsung_smdk4412-c60a5cf7af0a94cf8b09ca22796affa5f5f0669a.zip kernel_samsung_smdk4412-c60a5cf7af0a94cf8b09ca22796affa5f5f0669a.tar.gz kernel_samsung_smdk4412-c60a5cf7af0a94cf8b09ca22796affa5f5f0669a.tar.bz2 | |
tc35815: Increase timeout for mdio
The current timeout value is too short for very high-load condition
which jiffies might jump up in busy-loop.
Also add minimum delay before checking completion of MDIO.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tc35815.c')
| -rw-r--r-- | drivers/net/tc35815.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/tc35815.c b/drivers/net/tc35815.c index 62965d6..f42aaf7 100644 --- a/drivers/net/tc35815.c +++ b/drivers/net/tc35815.c @@ -594,9 +594,10 @@ static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum) struct net_device *dev = bus->priv; struct tc35815_regs __iomem *tr = (struct tc35815_regs __iomem *)dev->base_addr; - unsigned long timeout = jiffies + 10; + unsigned long timeout = jiffies + HZ; tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA); + udelay(12); /* it takes 32 x 400ns at least */ while (tc_readl(&tr->MD_CA) & MD_CA_Busy) { if (time_after(jiffies, timeout)) return -EIO; @@ -610,11 +611,12 @@ static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val) struct net_device *dev = bus->priv; struct tc35815_regs __iomem *tr = (struct tc35815_regs __iomem *)dev->base_addr; - unsigned long timeout = jiffies + 10; + unsigned long timeout = jiffies + HZ; tc_writel(val, &tr->MD_Data); tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA); + udelay(12); /* it takes 32 x 400ns at least */ while (tc_readl(&tr->MD_CA) & MD_CA_Busy) { if (time_after(jiffies, timeout)) return -EIO; |